this.events.listen(_EXT_NOTIFICATION_EVENTS.call_requested,this.userNotificationChannel,data=>{
            console.log('call need to be answered data',data[0].message.callData);
            let callData=data[0].message.callData;
            callData.callToMake=false;
            let modal=Modal.create(AnswerCallPage,{callData:callData});
            this.navController.present(modal);

        });

  presentFilter() {
    let modal = Modal.create(FiltersPopupPage, {masterData:this.allItems, activeFilters:this.activeFilters, filteredData:this.filteredItems});
    this.nav.present(modal);
    modal.onDismiss(data => {
      if(data){
        console.log('modal dismissed');
        console.log(data);
        this.filteredItems=data.filteredData;
        this.filteredItemsPreSearch=data.filteredData;
        this.activeFilters=data.activeFilters;
      }

    });
  }

 showAll(){
     //the second parameter is to sent locationData to the modal.
     let modal = Modal.create(ReviewsModalComponent,{reviews:this.reviews,user:this.user});
     this.navController.present(modal);
 }

 handler: () => {
   audio.src = 'http://www.yaoshining.com/file/musicyao?key=Isaac%20Shepard-Felicity.mp3';
   audio.play();
   let modal = Modal.create(PlayerPage);
   this.nav.present(modal);
 }

 showAll(){
     //the second parameter is to sent locationData to the modal.
     let modal = Modal.create(SpecialitiesModal,{specialities:this.specialities});
     this.navController.present(modal);
 }

 show(speciality:SpecialityObject){
     //the second parameter is to sent locationData to the modal.
     let modal = Modal.create(SpecialitiesModal,{specialities:[speciality]});
     this.navController.present(modal);
 }

 showAll(){
     //the second parameter is to sent locationData to the modal.
     let modal = Modal.create(EndorsementsModal,{endorsements:this.endorsements});
     this.navController.present(modal);
 }

	static _show(nav:NavController, email:string/*password:FirebaseAuthDataPassword*/):void {
		let modal = Modal.create(ChangePasswordPage, {email: email}/*{password: password}*/, {enableBackdropDismiss: false});
		nav.present(modal);
	}

 show(review:ReviewObject){
     //the second parameter is to sent locationData to the modal.
     let modal = Modal.create(ReviewsModalComponent,{reviews:[review],user:review.reviewed_user});
     this.navController.present(modal);
 }